The Challenge Mining Company organized in 1904 to work the Baltic Lode. The mine reached 800' depth in 1909 when it shut down due to a copper output too low to support operations.
Cache is located next to an old foundation. Not having a map of this mine, I'm not sure what this foundation is. First thought was a hoist, with the large mounting bolts, but, foundation appears a little small for a hoist.
Continue down the road to find the poor rock pile.